package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public void saveCategory(CategoryDTO categoryDTO) {

        // 保存分类信息
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        category.setStatus(StatusConstant.ENABLE);
        /**
         * 公共字段，已经设置自动填充，不需要再设置
         */
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());

        categoryMapper.saveCategory(category);
    }

    @Override
    public void updateCategory(CategoryDTO categoryDTO) {
        // 更新分类信息
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
//        category.setUpdateUser(BaseContext.getCurrentId());
//        category.setUpdateTime(LocalDateTime.now());

        categoryMapper.updateCategory(category);
    }

    @Override
    public PageResult pageCategory(CategoryPageQueryDTO categoryPageQueryDTO) {
        // 分页查询分类信息
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());

        Page<Category> page = categoryMapper.pageCategory(categoryPageQueryDTO);

        long total = page.getTotal();
        List<Category> records = page.getResult();

        return new PageResult(total, records);
    }

    @Override
    public void deleteCategory(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if (count > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if (count > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        // 删除分类信息
        categoryMapper.deleteCategory(id);
    }

    @Override
    public List<Category> getCategoryByType(Integer type) {
        // 根据类型查询分类信息
        List<Category> category = categoryMapper.getCategoryByType(type);
        return category;
    }

    @Override
    public void updateCategoryStatus(Integer status, Long id) {
        // 更新分类状态
        Category category = Category.builder()
                .id(id)
                .status(status)
//                .updateUser(BaseContext.getCurrentId())
//                .updateTime(LocalDateTime.now())
                .build();

        categoryMapper.updateCategory(category);
    }
}
